Getting married while having a toddler

My FH and I are getting married in August and we have a 18 month old daughter! Our wedding is 3 hours away and it's in the evening 7pm and the dinner afterwards will go until about 11pm. Her bedtime currently is 7:30pm.. any advice on how to do this with her and not be stressed the whole time?

We are thinking to get a sitter for her in our Airbnb for the dinner portion and praying that she'll sleep in the hotel room..

Has anyone else gotten married with a young toddler who still needs naps and has an early bedtime?